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Home > GCSE > Biology > Everything you need to know for the first biology exam!

Everything you need to know for the first biology exam!

Hey, so I put together a slide show to help me with the Biology '1a and 1b' exam and thought that I would share it wwith you! It is helpful and it's for the new AQA specification which there isn't much help on anymore! It goes through the CGP revision guide but easier and more colourful!

Slides in this set

Slide 1

Slide 2

Diet and Metabolic RateThere are 7 food groups-O WaterO Carbohydrates: release energyO Fats: to keep warm and release energyO Protein: for growth, cell repair and replacementO Fibre: to help the digestive systemO Vitamins and minerals: general healthMetabolic rate depends on who you are (exercise,gender etc.) and is the speed that the chemicalreactions which keep us alive occur!…read more

Slide 3

Factors affecting healthO Unbalanced diet: eating too much or too little can mess with the way your body should work which can make you ill.O Not enough exercise: exercise increases the amount of energy you use which decreases the amount stored by fat, it builds muscle and can increase metabolic rateO Inherited factors: depending on genetics, some medical issues can be inherited…read more

Slide 4

Fighting DiseaseOur bodies are SUPER clever, like seriously!The `Bad Guys'-Bacteria (very small living cells)O They reproduce very quickly and make you ill by damaging your cells and produce toxins-Viruses (not cells, they're tiny tiny tiny)O They invade your cells and use the cells machinery to replicate themselves, the cell bursts releasing the viruses and making you feel ill.…read more

Slide 5

Fighting Disease To protect ourselves we have white blood cells which are the `Superheroes' in regards to disease.1) They can consume them2) Produce antibodies3) Produce antitoxins…read more

Slide 6

Fighting disease...O Some drugs relieve symptoms (aspirin), others cure (penicillin).O Bacteria can become resistant though to antibiotics by mutating so they aren't killed by the antibiotic. The resistant strands will survive and reproduce so the number will increase, making the infection very seriosus (MRSA)O You can investigate antibiotics by growing microorganisms in the lab.O Semmelweis cut deaths from birth by making people clean their hands in an antiseptic solution.O Antibiotic resistance is becoming more common due to an overuse of antibiotics…read more